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<HTML>
<HEAD>
<TITLE> DwFieldBody Man Page </TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF">
<H2>
<FONT COLOR="navy"> NAME </FONT>
</H2>
<P>
DwFieldBody -- Class representing a MIME header field body
<H2>
<FONT COLOR="navy"> SYNOPSIS </FONT>
</H2>
<PRE>class DW_EXPORT DwFieldBody : public <A HREF="msgcmp.html">DwMessageComponent</A> {
friend class DwField;
public:
<A HREF="fieldbdy.html#DwFieldBody">DwFieldBody</A>();
<A HREF="fieldbdy.html#DwFieldBody">DwFieldBody</A>(const DwFieldBody& aFieldBody);
<A HREF="fieldbdy.html#DwFieldBody">DwFieldBody</A>(const DwString& aStr, DwMessageComponent* aParent=0);
virtual ~DwFieldBody();
const DwFieldBody& <A HREF="fieldbdy.html#op_eq">operator =</A> (const DwFieldBody& aFieldBody);
void <A HREF="fieldbdy.html#SetOffset">SetOffset</A>(int aOffset);
void <A HREF="fieldbdy.html#SetFolding">SetFolding</A>(DwBool aTrueOrFalse);
DwBool <A HREF="fieldbdy.html#IsFolding">IsFolding</A>() const;
protected:
int mLineOffset;
DwBool mDoFolding;
public:
virtual void <A HREF="fieldbdy.html#PrintDebugInfo">PrintDebugInfo</A>(ostream& aStrm, int aDepth=0) const;
virtual void <A HREF="fieldbdy.html#CheckInvariants">CheckInvariants</A>() const;
protected:
void _PrintDebugInfo(ostream& aStrm) const;
};
</PRE>
<H2>
<FONT COLOR="navy"> DESCRIPTION </FONT>
</H2>
<P>
<B><TT>DwFieldBody</TT></B> represents the field-body element in the BNF
grammar specified by RFC-822. It is an abstract base class that defines the
interface common to all structured field bodies.
<P>
In the tree (broken-down) representation of a message, a
<B><TT>DwFieldBody</TT></B> object may be either a leaf node, having a parent
but no child nodes, or an intermediate node, having a parent and one or more
child nodes. The parent node is the
<B><TT><A HREF="field.html">DwField</A></TT></B> object that contains it.
Child nodes, if present, depend on the particular subclass of
<B><TT>DwFieldBody</TT></B> that is instantiated. A
<B><TT>DwAddressList</TT></B> object, for example, has
<B><TT>DwAddress</TT></B> objects as its child nodes.
<P>
Since <B><TT>DwFieldBody</TT></B> is an abstract base class, you cannot create
instances of it directly. Normally, objects of classes derived from
<B><TT>DwFieldBody</TT></B> are obtained by calling convenience member functions
in the class <B><TT><A HREF="headers.html">DwHeaders</A></TT></B>.
<P>
Some MIME parsers are broken in that they do not handle the folding of some
fields properly. <B><TT>DwFieldBody</TT></B> folds its string representation
by default. You can disable folding, however, by calling the
<B><TT>SetFolding()</TT></B> member function. To determine if folding is
enabled, call <B><TT>IsFolding()</TT></B>.
<H2>
<FONT COLOR="navy"> Public Member Functions </FONT>
</H2>
<P>
<FONT COLOR="teal"><B> <A NAME="DwFieldBody">DwFieldBody</A>() <BR>
DwFieldBody(const DwFieldBody& aFieldBody) <BR>
DwFieldBody(const DwString& aStr, DwMessageComponent* aParent=0)
</B></FONT>
<P>
The first constructor is the default constructor, which sets the
<B><TT>DwFieldBody</TT></B> object's string representation to the empty string
and sets its parent to <B><TT>NULL</TT></B>.
<P>
The second constructor is the copy constructor, which performs a deep copy
of <B><TT>aFieldBody</TT></B>. The parent of the new
<B><TT>DwFieldBody</TT></B> object is set to <B><TT>NULL</TT></B>.
<P>
The third constructor copies <B><TT>aStr</TT></B> to the
<B><TT>DwFieldBody</TT></B> object's string representation and sets
<B><TT>aParent</TT></B> as its parent. The virtual member function
<B><TT>Parse()</TT></B> should be called immediately after this constructor
in order to parse the string representation. Unless it is
<B><TT>NULL</TT></B>, <B><TT>aParent</TT></B> should point to an object of
a class derived from <B><TT>DwField</TT></B>.
<P>
<FONT COLOR="teal"><B> const DwFieldBody& <A NAME="op_eq">operator =</A>
(const DwFieldBody& aFieldBody) </B></FONT>
<P>
This is the assignment operator, which performs a deep copy of
<B><TT>aFieldBody</TT></B>. The parent node of the
<B><TT>DwFieldBody</TT></B> object is not changed.
<P>
<FONT COLOR="teal"><B> void <A NAME="SetOffset">SetOffset</A>(int aOffset)
</B></FONT>
<P>
Sets the offset to <B><TT>aOffset</TT></B>. The offset is used when folding
lines. It indicates how much the first line should be offset to account for
the field name, colon, and initial white space.
<P>
<FONT COLOR="teal"><B> void <A NAME="SetFolding">SetFolding</A>(DwBool
aTrueOrFalse) </B></FONT>
<P>
Enables (<B><TT>aTrueOrFalse = DwTrue</TT></B>) or disables
(<B><TT>aTrueOrFalse = DwFalse</TT></B>) the folding of fields. The default
is to fold fields. Unfortunately, some parsers are broke and do not handle
folded lines properly. This function allows a kludge to deal with these broken
parsers.
<P>
<FONT COLOR="teal"><B> DwBool <A NAME="IsFolding">IsFolding</A>() const
</B></FONT>
<P>
Returns a boolean indicating if folding of fields is enabled.
<P>
<FONT COLOR="teal"><B> virtual void
<A NAME="PrintDebugInfo">PrintDebugInfo</A>(ostream& aStrm, int aDepth=0)
const </B></FONT>
<P>
This virtual function, inherited from <B><TT>DwMessageComponent</TT></B>,
prints debugging information about this object to <B><TT>aStrm</TT></B>.
It will also call <B><TT>PrintDebugInfo()</TT></B> for any of its child
components down to a level of <B><TT>aDepth</TT></B>.
<P>
This member function is available only in the debug version of the library.
<P>
<FONT COLOR="teal"><B> virtual void
<A NAME="CheckInvariants">CheckInvariants</A>() const </B></FONT>
<P>
Aborts if one of the invariants of the object fails. Use this member function
to track down bugs.
<P>
This member function is available only in the debug version of the library.
<P>
</BODY></HTML>
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